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Backdoor.BotGet.FtpB.Gen

First posted on 21 November 2011.
Source: BitDefender

Aliases :

Backdoor.BotGet.FtpB.Gen is also known as W32/Sdbot.worm.bat.b, (McAfee.

Explanation :

Backdoor.BotGet.Ftp?.Gen detects scripts used by some malicious IRC bots (eg: SDBot / Rbot) and worms (eg: Lovgate) in propagation from one computer to another.

A worm/bot installed on a machine searches for other computers in the same network or even in the internet. Once it finds a computer, it sends a malformed TCP packet that will cause the target computer to execute the content of the packet (which is a batch script - Backdoor.BotGet.FtpA.Gen)

Files detected are

Backdoor.BotGet.FtpA.Gen is a batch file that runs system utility FTP.EXE with a ftp script that downloads the worm on the victim computer and executes it, deletes the ftp script and then it deletes itself (the ftp script is detected as Backdoor.BotGet.FtpB.Gen)

Computers on which such files are detected are most likely to lack security patches (windows updates) for the Windows operating system (see Backdoor.SDBot / Backdoor.Rbot descriptions) and/or have weak passwords on accounts with administrator rights.

Usually, if such a file is found on a computer in a LAN, it is very possible that other systems may have been compromised as well.

Last update 21 November 2011

 

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